HP Tuners GM Gen 4 Training Part 25: Spark Timing | Evans Performance Academy

Follow along with lead instructor, Jeff Evans, as he walks you through the main spark timing tables used in a GM Gen 4 ECM. We explore logging spark timing within the VCM scanner in order to expose if the high octane or low octane spark timing table is being sourced during operation. To view the course, you can either subscribe monthly or purchase the course outright. SUBSCRIBE: http://evansperformanceacademy.com PURCHASE: https://www.evansperformanceacademy.c... PLUS there's still time left to save $500 on the lifetime membership option, which gives you access to all past, current, and future content and training courses. Simply enter promo code HB500 at checkout. Good through July ONLY!! PURCHASE LIFETIME: https://evansperformanceacademy.vhx.t...